Münster 2002 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 14: Poster Session: Instrumentation and Applications

HK 14.12: Poster

Dienstag, 12. März 2002, 10:30–12:45, Foyer Chemie

Stabilization system for the A4-Compton-Polarimeter — •Jürgen Diefenbach — Institut für Kernphysik, Universität Mainz

The A4-Collaboration at the University of Mainz measures parity violation in electron proton scattering. The longitudinal polarization of the electron beam is to be measured with a compton backscattering polarimeter. The intracavity design requires long laser resonator arms. It is therefore important to properly stabilize the optics. First an overview of the stabilization requirements is given, then implementation methods using analog and digital filters are presented. The effects on the measuring accuracy are discussed.